Main Details

15 watts, the circuitry appears to be almost identical to the Mk IX Westminster which is rated at 10 watts. It has the same valve compliment of a pair of ECL82 (better known as 6BM8 in the US) power valves and a single ECC83 valve on the pre-amp front end. A couple of resistors and capacitors have different values to the Mk IX version but that’s about all.